Famous scientists often get a rather heroic image in later accounts of their work. In Fabulous science
John Waller looks at the truth behind some of these stories. In the first part he looks at experiments such as Eddington's eclipse expedition to test general relativity, and shows that these weren't as conclusive as is often claimed. The second part looks at how history has treated various scientists - for instance Alexander Fleming, who is seen as the
discoverer of Penicillin, despite not being the first person to notice it's effects nor being responsible for its development into a useful drug. Waller's examination of the details of such stories makes for an informative and enjoyable read.
Sometimes Waller goes to far in the other direction, and seems to be putting scientists up upon a pedestal merely to be able to knock them down again. However, this tendency decreases as the book goes on, (and Waller does much better in avoiding it in his later work Leaps in the dark).
Several of the chapters involve a religious element - with Waller showing that the science/religion divide is usually not as wide as the stories claim. He puts forward the idea that this divide was largely the result of a campaign in the second half of the nineteenth century by those who wanted to professionalize science by excluing amateurs such as clergymen.